/*
   Driving a 5V stepper motor using Keyes L298N Dual Motor Driver;
  Gabby Shimoni 17-Feb-2019
*/
const int ENA = 7;
const int IN1 = 6;
const int IN2 = 5;
const int ENB = 8;
const int IN4 = 9;
const int IN3 = 10;
const int ledPin = 13;
void setup()
{
  pinMode(ENA, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(ENB, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);
  //delay is used to control the speed, the lower the faster.
  //reverse(step,delay);
  reverse(4096, 1);
  //forward(step,delay);
  forward(4096, 1);
}
void loop()
{
}
void reverse(int i, int j) {
  // set both motors ON
  digitalWrite(ENA, HIGH);
  digitalWrite(ENB, HIGH);
  while (1)   {
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 1);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 1);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 1);
    delay(j);
    i--;
    if (i < 1) break;
  }
  // set both motors OFF
  digitalWrite(ENA, LOW);
  digitalWrite(ENB, LOW);
}  // end reverse()



void forward(int i, int j) {
  // Set both motors ON
  digitalWrite(ENA, HIGH);
  digitalWrite(ENB, HIGH);
  while (1)   {
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 1);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 1);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 1);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 0);
    delay(j);
    i--;
    if (i < 1) break;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 1);
    digitalWrite(IN4, 1);
    delay(j);
    i--;
    digitalWrite(IN1, 0);
    digitalWrite(IN2, 0);
    digitalWrite(IN3, 0);
    digitalWrite(IN4, 1);
    delay(j);
    i--;

    if (i < 1) break;
   
  }
  // set both motors OFF
  digitalWrite(ENA, LOW);
  digitalWrite(ENB, LOW);
}  // end forward()